Increase root volume size in AWS

1. Increase disk size from AWS console:

Volumes -> choose disk -> Actions -> Modify Volume -> enter new value in Size field:

2. Use the lsblk command to display information about the block devices attached to your instance:

# lsblk
..
nvme0n1     259:11   0   40G  0 disk
└─nvme0n1p1 259:12   0   35G  0 part /

The root volume, /dev/nvme0n1, has a partition, /dev/nvme0n1p1. While the size of the root volume reflects the new size, 40 GB, the size of the partition reflects the original size, 35 GB, and must be extended before you can extend the file system.

3. To extend the partition on the root volume, use the following growpart command:

# growpart /dev/nvme0n1 1

CHANGED: partition=1 start=2048 old: size=73398239 end=73400287 new: size=83883999 end=83886047

4. Verify new size:

# lsblk
..
nvme0n1     259:11   0   40G  0 disk
└─nvme0n1p1 259:12   0   40G  0 part /

5. Use the df -Th command to verify the size of the file system for root volume:

# df -Th /

Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs    35G  4.2G   31G  12% /

6. From the above output, we see that filesystem is XFS, grow it using xfs_growfs

# xfs_growfs -d /

meta-data=/dev/nvme0n1p1         isize=256    agcount=36, agsize=262080 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0 spinodes=0 rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=9174779, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 9174779 to 10485499

If filesystem is ext2, ext3, or ext4, you should use resize2fs.

7. Check new size:

# df -Th /

Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/nvme0n1p1 xfs    40G  4.2G   36G  11% /

About Mariami Kupatadze
Oracle Certified Master Linkedin: https://www.linkedin.com/in/mariami-kupatadze-01074722/

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